Split shaft low pressure hydraulic pump

Abstract

The utility model belongs to the technical field of engine hydraulic pump, especially relates to a split axle type low pressure hydraulic pump, include: second axle, shaft coupling, first axle, drive key, pump head, pump body and side cover, the pump body is set on the first axle, the side cover is set on the second axle, the drive key is installed in the inner hole of pump head one side, one end of first axle is placed in the inner hole and is connected with drive key transmission, the other end of first axle is connected with one end of shaft coupling, the other end of shaft coupling is connected with one end of second axle, the pump head and side cover are located at both ends of pump body respectively. The utility model discloses through the structure of optimization axle, increases the shaft coupling to realize the normal work of low pressure hydraulic pump, guarantees the engine efficiency and normal work to some extent, and also can realize high effect with low cost.

Description

Technical Field

[0001] This utility model belongs to the field of engine hydraulic pump technology, and particularly relates to a split-shaft type low-pressure hydraulic pump. Background Technology

[0002] Currently, this type of low-pressure hydraulic pump is used in engine power supply systems to repeatedly pressurize liquid and supply it to the fuel rail and injectors. The injectors then spray the low-pressure liquid into the intake manifold, where it is carried by air into the cylinder for combustion, thus meeting the engine's operating requirements. However, existing low-pressure hydraulic pumps suffer from shaft runout due to machining and assembly errors, leading to pump head wear and vibration. This reduces engine efficiency and can even affect the normal operation and safety of the system. Summary of the Invention

[0003] This utility model provides a split-shaft type low-pressure hydraulic pump to solve the problem that the shaft will run out due to machining errors and assembly errors of structural parts in traditional low-pressure hydraulic pumps.

[0004] The technical solution of this utility model is as follows: A split-shaft type low-pressure hydraulic pump includes: a second shaft, a coupling, a first shaft, a transmission key, a pump head, a pump body, and a side cover. The pump body is sleeved on the first shaft, and the side cover is sleeved on the second shaft. The transmission key is installed in the inner hole on one side of the pump head. One end of the first shaft is placed in the inner hole and is connected to the transmission key. The other end of the first shaft is connected to one end of the coupling, and the other end of the coupling is connected to one end of the second shaft. The pump head and the side cover are located at opposite ends of the pump body.

[0005] Furthermore, a first sealing ring is provided between the pump head and the pump body.

[0006] Furthermore, a second sealing ring is provided between the pump body and the side cover.

[0007] Furthermore, a first bearing is provided between the pump body and the first shaft, and the first bearing is interference-fitted with the pump body.

[0008] Furthermore, a second bearing is provided between the side cover and the second shaft, and the second bearing is press-fitted into the side cover.

[0009] Furthermore, a liquid inlet and a liquid outlet are provided on the other side of the pump head.

[0010] Furthermore, a flat part is provided at one end of the first shaft, and the flat part contacts the transmission key.

[0011] The beneficial effects of this utility model are as follows: This utility model optimizes the shaft structure and adds a coupling to achieve normal operation of the low-pressure hydraulic pump, which ensures engine efficiency and normal operation to a certain extent, while also achieving high efficiency at low cost. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0013] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0014] In the technical solution of this utility model, Figure 1 This is a structural schematic diagram of a split-shaft type low-pressure hydraulic pump according to the present invention, as shown in the figure. Figure 1 As shown, this utility model includes: Second shaft 11, coupling 9, first shaft 8, transmission key 3, pump head 1, pump body 4, and side cover 6.

[0015] The pump head 1 has a liquid inlet 101 and a liquid outlet 102 on its other side. The pump head 1 is provided with a liquid inlet 101 and a liquid outlet 102 to facilitate liquid flow.

[0016] The pump body 4 is sleeved on the first shaft 8, and a first bearing 7 is provided between the pump body 4 and the first shaft 8. The first bearing 7 is interference-fitted with the pump body 4. The first shaft 8 is coaxially arranged between the first bearing 7 and the pump head 1, and can rotate around the axial direction. At the same time, the shaft 8 has two flat structures, one of which cooperates with the transmission key 3, and the other of which cooperates with the coupling 9.

[0017] The side cover 6 is sleeved on the second shaft 11, and a second bearing 10 is provided between the side cover 6 and the second shaft 11. The second bearing 10 is press-fitted into the side cover 6 to provide lubrication and support for the second shaft 11. The second shaft 11 is coaxially arranged between the second bearing 10 and the side cover 6 and can rotate around the axial direction. At the same time, the second shaft 11 is provided with a flat structure to cooperate with the coupling 9.

[0018] The transmission key 3 is installed in the inner hole on one side of the pump head 1. One end of the first shaft 8 is placed in the inner hole and is connected to the transmission key 3. The other end of the first shaft 8 is connected to one end of the coupling 9. The other end of the coupling 9 is connected to one end of the second shaft 11. The pump head 1 and the side cover 6 are located at the two ends of the pump body 4, respectively.

[0019] The coupling 9 is positioned between the first shaft 8 and the second shaft 11 to connect them. Specifically, both ends of the coupling mate with the flat structures of the second shaft 11 and the first shaft 8, thereby achieving a transmission connection between the first shaft 8 and the second shaft 11. The coupling 9 can be independent of the second shaft 11 and the first shaft 8, relying on the pressure between the pump body 4 and the side cover 6 for contact. The coupling compensates for misalignment between the two shafts caused by machining dimensions and assembly errors, deformation during operation, or thermal expansion, ensuring the normal operation and efficiency of the pump.

[0020] One end of the first shaft 8 is provided with a flat part, which contacts the transmission key 3, so that the transmission key 3 and the first shaft can transmit power.

[0021] A first sealing ring 2 is provided between the pump head 1 and the pump body 4. The first sealing ring 2 is axially arranged between the pump head 1 and the pump body 4 to seal leaked liquid.

[0022] A second sealing ring 5 is provided between the pump body 4 and the side cover 6. The first sealing ring 5 is axially arranged between the pump body 4 and the side cover 6 to seal leaked liquid.

[0023] The working principle of this utility model: This split-shaft low-pressure hydraulic pump is mainly driven by an external drive unit to first drive the second shaft 11 to rotate, and then transmits the torque to the first shaft 8 through the coupling 9. The first shaft 8 drives the pump head 1 to rotate through the transmission key 3. Liquid is drawn into the pump head 1 from the liquid inlet 101. As the pump head 1 rotates, the liquid is compressed, generating a certain pressure and being forced out of the pump from the liquid outlet 102.

[0024] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A split-shaft type low-pressure hydraulic pump, characterized in that, include: The pump body (4) consists of a second shaft (11), a coupling (9), a first shaft (8), a transmission key (3), a pump head (1), a pump body (4), and a side cover (6). The pump body (4) is fitted onto the first shaft (8), and the side cover (6) is fitted onto the second shaft (11). The transmission key (3) is installed in the inner hole on one side of the pump head (1). One end of the first shaft (8) is placed in the inner hole and is connected to the transmission key (3). The other end of the first shaft (8) is connected to one end of the coupling (9), and the other end of the coupling (9) is connected to one end of the second shaft (11). The pump head (1) and the side cover (6) are located at the two ends of the pump body (4), respectively.

2. The split-shaft type low-pressure hydraulic pump as described in claim 1, characterized in that, A first sealing ring (2) is provided between the pump head (1) and the pump body (4).

3. The split-shaft type low-pressure hydraulic pump as described in claim 1, characterized in that, A second sealing ring (5) is provided between the pump body (4) and the side cover (6).

4. The split-shaft type low-pressure hydraulic pump as described in claim 1, characterized in that, A first bearing (7) is provided between the pump body (4) and the first shaft (8), and the first bearing (7) is interference-fitted with the pump body (4).

5. The split-shaft type low-pressure hydraulic pump as described in claim 1, characterized in that, A second bearing (10) is provided between the side cover (6) and the second shaft (11), and the second bearing (10) is press-fitted into the side cover (6).

6. The split-shaft type low-pressure hydraulic pump as described in claim 1, characterized in that, The pump head (1) is provided with a liquid inlet (101) and a liquid outlet (102) on the other side.

7. The split-shaft type low-pressure hydraulic pump as described in claim 1, characterized in that, One end of the first shaft (8) is provided with a flat part, which is in contact with the transmission key (3).

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